Chuck for piston-rings.



D. P. DOMIZI. CHUCK FOR PISTON RINGS. APPLIUATIO'N FILED 111111.18,1911.

Patented Apr. 30, 1912 DAY/D F.' .DOM/ZI DAVID F. DOMIZI, OF FRANKLIN,PENNSYLVANIA.

CHUCK FOR PISTON-RINGS.

Loaasa.

Specification of Letters Patent.

Patented Apr. 30, 1912.

Application led March 18, 1911. Serial No. 615,379.

To all whom 'it may concern:

Be it known that I, DAvm F. Domzi, citizen of the United States,residing at Franklin, in the county of Venango and State ofPennsylvania, have invented certain new and useful Improvements inChucks for liston-Rings, of which the following is a specification.

The object, construction and operation of my improved chuck are hereinset forth with sufficient clearness to enable those skilled in the artto which it relates to make and use the same.

In the drawings I have illustrated one way in which my improved chuckmay be constructed and operated, the various figures of said drawingsbeing as follows: I

Figure 1 shows my chuck attached to the live spindle of a lathe, orother machinetool, together with a pneumatic appliance arranged tooperate said chuck. Fig. 2 is a perspective vview of my chuckdisconnected from the spindle of said machine-tool. Fig. 3 is a faceview of a centering device which I employ in said chuck. Fig. L1 is aface view of the chuck body. Fig. 5 is a face view of my chuck with apiston ring in position to be clamped, and with the clamping plateremoved. Fig. 6 is the clampingl plate.

The object of my invention is to provide a convenient, efficient, easilyand quickly operated chuck for the accurate and final finishing of theperiphery of piston rings, though said chuck may be employed for thefinishing or turning of other annuli of like nature. The construction bymeans of which I attain said objects is substantially i as follows z--Iconstruct a cylindrical body said rod 6 1 which is arranged to'beattachedto the live spindle 2 ofa lathe, grinding machine, or othersuitable machine-tool. In the outer, perpendicular clamping face of saidbody I form an annular groove 3 for the reception of the annular' tongue4t of a centering ring 5, the precise object of which will presently beset forth. A longitudinallymovable clamping-rod 6 passes through saidbody 1 and projects somewhat beyond the clamping face thereof. The outerend of is formed into a head consisting of two diametrically opposedengaging lugs 7, 7. A clamping ring 8, has a central opening 9 thereinwhich conforms to the shape f5 of the head of said bar 6 and is adaptedto pass over said head and to be engaged thereby when turned to anon-registering position, substantially as shown in Fig. 2. Said platehas also a perpendicular clamping face arranged in juxtaposition to theclamping face of body 1, and between these two opposing faces the ring10, or other article is clamped when the chuck is in operation.

In Figs. l, 2 and 5, I have shown a piston ring 10 in position in mychuck, which ring is placed in position in said chuck, also removedtherefrom, by removing the clamping plate S. Plate 8 may be readilyremoved by turning same so that 'the lug-slots 7', 7', of the opening 9,are in register with the lugs 7. After ring 10 is in position, theclamping ring or plate 8 is replaced and turned to the position shownin-Fig. 2, and by causing lugs 7 to bear firmly against said plate,bymeans presently to be explainedsaid ring 10 is held firmly in position,so that its periphery may be finished as desired. For the purpose ofpositioning ring l() centrally and accurately in the chuck, I provide acentering ring 5, the annular tongue of which enters the annular groove3 in body 1, and when ring10 is placed over the same, it is properly andcentrally positioned by causing a contact of ring 10 with ring 5 at thepoint indicated by X in Fig. 5. Ring 5 is made removable so thatcentering rings of various sizes may be used, thus readily adapting thechuck to be used with rings which vary somewhat in diameter.

Clamping rod 6 is actuated longitudinally by means of an actuating head,which is 'attached to the opposite end of spindle 2.

Said head consists of a cylinder 11 in which is a. fluid-actuated piston12, arranged to he directly connected by an intermediate stem 13 t-o rodG. The outer cud of piston 12 is provided with a sleeve 14, linto whichan induction and eduction pipe 15 is inserted, through a suitablestuffing gland to prevent leakage of the actuating fluid. Sleeve 14 isrevoluble upon pipe 15. Piston 12 is held in the non-clamping positionby means of the spring 16, and when airis admitted through pipe 15 itpasses through duct 17 and causes piston to move in the direction awayfrom the chuck so that lugs 7 bear firmly upon plate 8, and causes saidplate to clamp ring 10 firmly between the opposing vertical faces ofsaid plate and the body 1. IVhen the air or other actuating fluid isreleased and permitted to escape fram behind zh@ piston il?s Spruw l@rf:- trzrns said pison to its minimal p05 ,im and arises lugs 7 imrelease plm@ 8 sucently so that it muy be rumeni t@ the removal Siton,as above muted.

55mm 13 is SurQW-;mended at @iriver wird, und screws into rod l am@ intrsimu 18 of the p ,ion, and', by 'Huis consruciun am :M: ufslvflb'iiiy oflength is provided for .in ih@ dumping rod, so hn; rings of Various hidm4355115 muy be @bumped in Hr@ Chuck.

In placing a ring in my mpromd chuck. employ ih@ Clufiing and @buckingdevice, howl in un. application for Letters Fatemi' of rbc Und Mmes,file@ by me un lll@ 18th day of Mmch7 will] Serial MTU. 015,330.

chuck for pison, rings crnislngnr a burly' mlnped if; be {Krimi-hud wthe li spinali@ of a machine tool and having a clmnpng fue@ periendicuarto the axis of said spjnda, ring-centering means axed to said. ffice :mdarranged to secure 'the proper posmr of the perpwf of .fr piston ring byContact with f1 por mi Cfr its inner face,

purpo v Tn, @mummy whereof ffl am); my signature in presence @if 'mvowitnesses. A

DAVE@ F. DMIZI.

